<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-16 -289 16:30:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="15.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.16 (289) 16:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202628910161630009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.080" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.842" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="690.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.277" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.308" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="452.642" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="279.616" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.572" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="223.409" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="71.226" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="121.156" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="271.660" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 345.000 350.000 350.000 350.000 352.500 355.000 360.000 365.000 366.667 368.333 370.000 372.500 375.000 375.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 414.900 419.800 424.699 429.599 434.499 439.399 444.299 449.199 454.098 458.998 463.898 468.798 473.698 478.598 483.497 488.397 493.297 498.197 503.097 507.997 512.896 517.796 522.696 527.596 532.496 537.396 542.295 547.195 552.095 556.995 561.895 566.795 571.694 576.594 581.494 586.394 591.294 596.194 601.093 605.993 610.893 615.793 620.693 625.593 630.492 635.392 640.292 645.192 650.092 654.992 659.891 664.791 669.691 674.591 679.491 684.391 690.000 700.000 710.000 720.000 730.000 745.000 760.000 775.000 795.000 820.000 847.126
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 0 57 66 69 0 60 66 57 0 0 66 51 63 66 69 69 72 63 69 66 69 66 66 69 63 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 2.734375 -0.390625 1.953125 1.953125 1.171875 -1.171875 1.171875 -0.390625 2.734375 1.953125 1.171875 -2.734375 -2.734375 -1.953125 1.953125 2.734375 -2.734375 -1.953125 -0.390625 -0.390625 1.171875 -1.171875 1.171875 -2.734375 0.390625 2.734375 1.171875 1.171875 -1.953125 -1.171875 0.390625 -2.734375 1.171875 -2.734375 -1.171875 -2.734375 -1.953125 -0.390625 1.953125 1.171875 -2.734375 1.953125 1.171875 -2.734375 1.171875 2.734375 1.171875 -1.171875 -2.734375 1.171875 -1.171875 2.734375 -0.390625 1.953125 0.390625 0.390625 1.171875 0.390625 2.734375 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.501 90.0 95.0 100.0 105.0 110.0 112.018 114.037 115.0 116.055 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 452.642 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.204 2.836 3.17 3.277 3.155 3.155 3.213 3.277 3.385 3.51 3.628 3.742 3.855 3.969 4.083 4.199 4.316 4.437 4.56 4.685 4.814 4.945 5.078 5.213 5.35 5.488 5.626 5.765 5.903 6.04 6.176 6.31 6.443 6.574 6.703 6.829 6.954 7.077 7.198 7.317 7.434 7.549 7.662 7.774 7.884 7.993 8.101 8.207 8.312 8.416 8.519 8.62 8.721 8.821 8.92 9.019 9.116 9.213 9.309 9.404 9.498 9.592 9.684 9.775 9.865 9.953 10.038 10.121 10.2 10.274 10.341 10.399 10.446 10.48 10.498 10.5 10.5 10.496 10.49 10.48 10.466 10.45 10.431 10.409 10.384 10.356 10.326 10.293 10.258 10.221 10.181 10.139 10.095 10.049 10.001 9.951 9.899 9.846 9.791 9.735 9.677 9.618 9.558 9.496 9.434 9.37 9.305 9.239 9.173 9.105 9.037 8.968 8.898 8.828 8.757 8.686 8.614 8.542 8.469 8.396 8.323 8.25 8.176 8.103 8.029 7.955 7.881 7.807 7.733 7.659 7.585 7.511 7.438 7.364 7.291 7.218 7.145 7.072 7.0 6.928 6.856 6.784 6.713 6.642 6.572 6.502 6.432 6.363 6.294 6.226 6.158 6.09 6.023 5.956 5.89 5.825 5.759 5.695 5.63 5.567 5.504 5.441 5.379 5.317 5.256 5.195 5.135 5.076 5.017 4.958 4.9 4.843 4.786 4.73 4.674 4.619 4.564 4.51 4.456 4.403 4.35 4.298 4.247 4.196 4.145 4.095

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.277" PeakHeight="110.0" Num="3" Error="0.0">
-30.417 13.028 -3.11
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.277" EndFrequency="10.5" PeakHeight="452.642" Num="5" zHalfNm="279.616" Error="5.237">
-301.598 -58.694 34.666 -16.324 5.363
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.055" Depth="0.122"/>
<TopsideChapman PeakHeight="452.642" PeakDensity="1367866.0" PeakScaleHeight="121.156" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
